tonight, scotland yard's lead investigator says there may be as many as 4,000 victims in the case against rupert murdoch's media empire and among them, former prime minister gordon brown who says his family's privacy was violated by a story that hit very close to home. stephanie gosk has the report from london. >> reporter: the british public wants answers. rupert murdoch and top executive, rebecca brooks have all been asked to testify next week before a parliament committee. the powerful trio have yet to agree but "news international" the subsidiary that ran "the news of the world" is already defending itself against the latest allegations. in an interview on the bbc today, former prime minister, gordon brown, accused "news international" of employing known criminals to dig up personal information. >> i'm shocked. i'm genuinely shocked to find this happened because of the links with criminals. >> reporter: in 2006, a murdoch paper run at the time by rebecca brooks reported that brown's newborn son has cystic fibrosis. now brown questions the methods the paper used to get that information